/sup 205/Tl experiment. [Solar neutrino detector; accelerator mass spectroscopy of activated /sup 205/Pb]

Conference · Sun Jan 01 00:00:00 EST 1984

OSTI ID:6213468

Henning, W; Kutschera, W; Ernst, H; Korschinek, G; Kubik, P; Mayer, W; Morinaga, H; Nolte, E; Ratzinger, U; Mueller, M

/sup 205/Tl has been previously proposed as a geological detector for solar neutrinos, making use of the reaction /sup 205/Tl(nu, e/sup -/)/sup 205/Pb with a neutrino threshold of only approx. = 43 keV. We report on an experiment performed to study the feasibility of detecting radioactive /sup 205/Pb nuclei (T/sub 1/2/ = 15 million years) at very low concentrations using the recently developed technique of accelerator mass spectrometry. Employing the high-energy ion beams of good quality from the UNILAC heavy-ion accelerator at the GSI Darmstadt, we are able to demonstrate a suppression of neighbouring isotopes to better than 1 in 10/sup 16/ and of neighbouring elements to about 1 in 10/sup 3/. While these results are very encouraging, the minimum number of atoms detectable is still severely limited by the efficiency of producing multiply-charged ions from present ion sources. Future improvements in ion-source performance are briefly discussed.

• Research Organization: Argonne National Lab., IL (USA); Technische Univ. Muenchen, Garching (Germany, F.R.). Fakultaet fuer Physik; Gesellschaft fuer Schwerionenforschung m.b.H., Darmstadt (Germany, F.R.)
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 6213468
• Report Number(s): CONF-8408132-2; ON: DE85004031
• Resource Relation: Conference: Conference on solar neutrinos and neutrino astronomy, Lead, SD, USA, 23 Aug 1984; Other Information: Portions are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
HEAVY ION ACCELERATORS
ION SOURCES
NEUTRINO DETECTION
ACTIVATION DETECTORS
NEUTRINO REACTIONS
CAPTURE
SOLAR NEUTRINOS
THALLIUM 205 TARGET
ELECTRONS
LEAD 205
MASS SPECTROSCOPY
ACCELERATORS
BETA DECAY RADIOISOTOPES
DETECTION
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
EVEN-ODD NUCLEI
FERMIONS
HEAVY NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEAD ISOTOPES
LEPTON REACTIONS
LEPTONS
MASSLESS PARTICLES
MEASURING INSTRUMENTS
NEUTRINOS
NEUTRON DETECTORS
NUCLEAR REACTIONS
NUCLEI
RADIATION DETECTION
RADIATION DETECTORS
RADIATIONS
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SOLAR PARTICLES
SOLAR RADIATION
SPECTROSCOPY
STELLAR RADIATION
TARGETS
YEARS LIVING RADIOISOTOPES
440101* - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments
651925 - Nuclear Properties & Reactions
A=190-219
Experimental- Nuclear Reactions & Scattering- (-1987)